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(No Model.) 2 Sheets-Sheet 1;. G. D. EDMESTON.

RIVETING MACHINE.

No. 392,594. Patented Nov. 13, 1888.

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UNITED STATES PATENT rrrcn.

GRAY DEN ISON EDMESTON, OF MANCHESTER, COUNTY OF LAN (EASTER, ENG- LAND, ASSIGNOR TO DE BERGUE & (30., (LIMITEDQ OF SAME PLACE.

RlVETlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 392,594, dated November 13, 1888.

Application filed August], 1888. Serial No. 281,656, (No model.)

To all whom it may concern:

Be it known that I, GRAY DENISON EDMES- TON, a subject of the Queen of Great Britain, residing at Manchester, in the county of Lancaster, England, have invented certain new and useful Improvements in Riveting-Machines; audl dohereby deelarethe followingto bea full, clear, and exact description of the invention, such as will enable others skilled in the art to IO which it appcrtains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thcreou,which form a partof this specification.

The object of my invention is, first, such an arrangement of the parts of riveting-machines known as Allens PatentRiveting-lllaehines (and for which Letters Patent of the United States were granted to John Frankland Allen, dated December 4, 1883, No. 289,369) as will allow the machine to be used for operating upon rivets placed closer to the face of the object operated upon than heretofore; and, secondly, when the frames of riveting-machines are of such large dimensions as to require to be constructed in two halves, to provide a means of connecting and securing together these halves, so that the parts forming the connection shall be deprived of their elasticity or spring, and thereby afford a more rigid connection of the two halves or members when the maximum pressure is applied to the rivet.

In carrying out the first portion of my invention, instead of placing the moving cup- 5 holder concentric with the axis of the heading-ram which aetuates it, I place it eccentrically thereto, and I provide a sleeve or guide through which the cup-holder is free to slide or rotate,wl1ich gives it lateral support inde- 0 pendently of the ram or plunger into which it is screwed. I also bore the barrel into which the ram slides eccentricall y to the center of the head, so that the center of the cup-holder is thereby brought much nearer to the outside of 5 the head, and consequently can be applied closer than heretofore to the face of any work it is desired to operate upon.

In carrying out the second part of my invention, instead of connecting or securing together the two members or halves of the frame by the screwed bolts commonly used, I connect them by two double-headed gibs, which pass freely between and embrace suitable projections formed upon each side of each separate half of the frame. I then subject these gibs to their maximum tension, either by temporarily op erating the riveting mechanism with a piece of metal interposed between the cups, tending to force apart the two halves or members, or by the application of a hydraulic jack or other suitable mechanism, and while the gibs are in this state of maximum tension I fit a key or keys into suitable keyways formed in the joint of the two frames to prevent them closing up upon the removal of the force tending to separate them, in this way retaining the gibs permanently in a state of maximum tension and forming a rigid connection.

Figure 1 is a side elevation of my improved rivetingmachine. Fig. 2 is a transverse sectional elevation looking from onejaw toward that jaw or half of the framing carrying the fixed cup, and showing the gibs and belts or connections between the two halves of the framing; and Fig. 3 is a plan section on the line A B, Fig. 1, and showing parts below the section-line. Fig. 4 is a detached side elevation of the upper end of that half of the framing carrying the riveting-ram and other parts. Fig. 5 is a front elevation of the parts shown by Fig. 4, looking toward the cup end of the cup-holder. Fig. (Sis a plan section, (the side links only partly in section,) one part of the section being taken in the plane of the axis of the cup-holder, the other part of the section being in the plane of the axis of the ram; and Fig. 7 is a section in a verticalplane. Figs. 4 to 7, inclusive, are all upon an enlarged scale and refer to the same parts.

It will be clearly seen, by reference to Fig. 7, that the cup-holder 1) slides through a sleeve, 0', on the framing, and that the holder is screwed to screw into a hole in the ram (1, which hole is eccentric to the axis of the ram, and that the hole in the frame 0 in which the 5 ram d slides to and fro is eccentric to the hole in the sleeve 0 for the cup-holder b, and this prevents any tendency of the ram cl to turn. The trunnions c on each side of the framing for one end of the two side links, e, and the inner end of the middle link, f, are in about a horizontal plane, passing a little below the axis of the ram d.

In other respects the parts shown by Figs. 4 to 7, inclusive, are similar, as before said, to what is known as Allens Patent Rivetcr, but in order that the drawings may be more clearly understood the parts will be referred to by letters.

Z) is the riveting-cup; Z), its holder; (2, the ram; f, the middle link, one end of which is jointed by a pin,f, and to two disks,f in holesin the side of the ram d, as shown in Figs. 6 and 7. The pressure in riveting comes upon the end of the middle link, f, which fits against the ram (1, as shown in Figs. 6 and 7. The outer end of the middle 1ink,f, is jointed by a pin, 0, with the two side links, 6. The side links are kept on the pin a and trunnions e by set-screws and washers, as shown best in Fig. 6. The side links, c, move in working through the are shown in dotted line in Fi 4, and the outer end of the middle 1ink,f, moves in the same are, and the two extreme positions of the inner end of the joint-pin j" are shown by dotted circles in Fig. 4;.

One end of a eonnectingrod, g, (see Fig. 1,) is jointed to the boss of the lever f, which is on the pin 0, and the other end of this red r is jointed to the piston, the rod g having space to oscillate to the required extent within the hollow rod from the piston, which is what is known as a trunk-piston, It being its cylinder. 2' is a lever having its fulcrum on the cylinder h, one arm of the lever being connected with the valve-spindlej in a casing on the side of the cylinder h. It is the pipe for supplying fluid under pressure.

The lever-handle t is for admitting the pressure of the fluid to the trunk-piston when the rivet is to be compressed and for cutting oil the supply of fluid under pressure and open ing an eXhaust-port when the cup I) is to be withdrawn from the rivet. I wish it to be understood, as before stated, that this trunk-piston and cylinder and valve mechanism is old and well known as applied to this class of riveting-machines, and I make no claim to it.

The stationary cup If is secured to one side or half of the framing 0 as shown. The framing is formed in two halves, c and 0 and the lower ends of the halves are secured by bolts 0*; but it will be seen that no tension comes upon these bolts when pressure is put upon the rivets, but it comes upon gibs or bars with heads 0', which'fit in spaces formed by projections c on each side of each half of the frame, as shown in Figs. 1, 2, and 3.

If a piece of metal is placed between the stationary cup I)" and moving cup b, and the maximum pressure is put upon the metal, as when riveting, the maximum tension is thus put upon the gibs or bars 0, and they are thus stretched to a certain extent. Then wedges or cotters a are driven tightly in slots provided in and between and tending to separate the two halves ofthe framing c and 0 and this prevents the contraction of the gihs or bars 0 when the tension is removed. The wedges or cotters 0 come outside the gibs or bars a, as shown. It will thus be seen that when at work there is no tendency of the two halves c and 0* of the frame at the gibs or bars 0 to move to and from each other.

What I claim is- 1. In riveting-maehines, the combination of the cup carrier or holder 1), ram d, and sleeve 0, so that one is eccentric to or on one side of the other, substantially as and for the purpose herei nbefore described,and ill ustrated by Figs. 1, 4., 5, 6, and 7 of the drawings.

2. The combination of the two halves or jaws of the Framing of riveting-machines with tension gibs, bars, or other suitable connections and a wedge or wedges or cotters, or their equivalents, for retaining the maximum tension put upon the tension gibs, bars, or connections in riveting, substantially as hereinbet'ore described, and illustrated by the drawings.

In testimony whereof I have affixed my signature in presence of two witnesses.

GRAY DENISON EDMESTON.

Witnesses:

PETER J. LivsEY, WILLIAM FAULKNER. 

